基于DDS的多通道高频大功率电源设计  

Design of a DDS Based Multi-channel High Frequency High Output Power Supply System

作　　者：杨其华[1] 张珂[1] 毛谦敏[1] 

机构地区：[1]中国计量学院,杭州310018

出　　处：《仪器仪表学报》2006年第5期473-476,共4页Chinese Journal of Scientific Instrument

基　　金：国家十五重大专项(2002AA2Z2011)资助项目

摘　　要：介绍了一种4相位高频宽幅稳压电源,该电源主要用于生物芯片开发研究中产生旋转电场。4通道可调相位的高精度频率信号源由DDS发生,在标准50Ω负载下,通过二段放大实现100H z^100MH z带宽50V pp输出;通过引入幅度和相位检测负反馈,实现负载变化后稳定电源输出的幅度值和通道之间的相位差。A four-phase high frequency amplitude-stable power supply is introduced that is mainly used as a ro tary electric field generator in biochip research and development. Four-channel high precision frequency signals are generated by DDS. Via two-stage amplifiers these signals are amplified to 50Vpp output within 100Hz- 100MHz bandwidth at standard 50Ω load. Via amplitude and phase detection feedback, the output amplitude and phase discrepancies among multiple channels can be stabilized even if load is changeable.

关 键 词：DDS 宽带放大 幅度相位检测 

分 类 号：TN722.1[电子电信—电路与系统]